Пространства имён

Концепции C++: EqualityComparable

Материал из cppreference.com
< cpp‎ | concept

The type must work with == operator and the result should have standard semantics.

[править] Требования

Expression Requirements Return type
a == b
  • Commutativity (a == b yields the same as b == a)
  • Transitivity (if a == b and b == c, then a == c)
bool or a type implicitly convertible to bool